from socket import socket, AF_INET, SOCK_DGRAM
s = socket(AF_INET, SOCK_DGRAM)

s.sendto(b'',('localhost',20001))
print(f"{s.recvfrom(128) = }")

s.sendto(b'Hello',('localhost',20002))
print(f"{s.recvfrom(128) = }")
